/**
 * 
 */
package lec01.am;

import java.util.Scanner;

/**
 * @author Administrator
 * 
 */
public class Circle {
	final static double PI = Math.PI;

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner cin = new Scanner(System.in);

		double radius = cin.nextDouble();
		double perimeter = getPerimeter(radius);
		double area = getArea(radius);

		System.out.println("Perimeter=" + perimeter);
		System.out.printf("Area=%.3f\n", area);
		System.out.println(String.format("%.3f", area));
		System.out.print(String.format("%.3f\n", area));

		cin.close();

	}

	public static double getArea(double radius) {
		return PI * radius * radius;
	}

	public static double getPerimeter(double radius) {
		return 0;
	}

}
